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What volume of a 0.224 M perchloric acid solution is required to neutralize 26.0 mL of a 0.149 M calcium hydroxide
solution?
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STEP-BY-STEP EXPLANATION:

What to find? The volume of perchloric acid

Firstly, we need to write the balanced equation of the reaction

[tex]HClO_{4(aq)}\text{ + }Ca(OH)_{2(aq)}\rightarrow\text{ }H_2O_{(l)}\text{ + }Ca(ClO_4)_{2aq)}[/tex]

Given the following parameters

The concentration perchloric acid = 0.224M

The concentration of Calcium hydroxide = 0.149 M

The volume of Calcium hydroxide = 26.0mL

The volume of perchloric acid =?

Recall that the equivalentce point of a titration is

mole acid = mole base

Mole = Molarity x volume